A lot of progress.

src/storage.rs

@@ -34,6 +34,14 @@ impl Storage {
         &mut self.items[id]
     }
 
+    pub fn item(&self, id: usize) -> &Item {
+        &self.items[id]
+    }
+
+    pub fn item_mut(&mut self, id: usize) -> &mut Item {
+        &mut self.items[id]
+    }
+
     pub fn items_mut(&mut self) -> impl Iterator<Item = &mut Item> {
         self.items.iter_mut()
     }